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Span bolster edit
The diagram is self explanatory. There is a span bolster over the two three axle trucks at each end of the car. Peter Horn User talk 02:22, 31 August 2012 (UTC) Peter Horn User talk 02:25, 31 August 2012 (UTC)
- The diagram is very helpful, but it doesn't necessarily imply why such an assembly would be called a span bolster rather than something else...like a bogie bridge, perhaps. Reference citations are required for verification. Thewellman (talk) 17:43, 21 September 2014 (UTC)